IERP.sol

function newReferralProgram(
    bytes32 programId, 
    address hook
) external

function newReferral(
    bytes32 programId, 
    address referrer
) external

function getReferrer(
    bytes32 programId,
    address referral
) external view returns (
    address referrer
)

function getTotalReferrals(
    bytes32 programId,
    address referrer
) external view returns (
    uint256 totalReferrals
)

function getReferralProgramHook(
    uint256 programId
) external view returns (
    address hook
)